CN211715635U - Double-circulation structure oil pressure damper bottom valve assembly for railway vehicle - Google Patents

Abstract

The utility model relates to a rail vehicle is with two circulation structure oil pressure damper bottom valve subassembly, include: the valve comprises a valve seat, a one-way valve system, a pressure plate and a damping valve system. The utility model adopts a multi-group small valve plate type structure, the valve plate can not generate great noise when the oil pressure damper moves at high frequency, the sealing surface area of the valve plate is small, the processing difficulty is low, and the realization is easy; the sealing surfaces of the valve plate and the valve plate seat are arranged in the bottom valve seat, so that the sealing surfaces are not easy to collide and damage; simultaneously with valve block complex valve block seat, core disk seat and base valve seat be detachable structure, can dismantle the change after impaired, can not cause scrapping of whole base valve seat, be favorable to the maintenance of product.

Description

Double-circulation structure oil pressure damper bottom valve assembly for railway vehicle

Technical Field

The utility model belongs to the technical field of oil pressure shock absorber for rail vehicle, concretely relates to two circulation structure oil pressure shock absorber bottom valve subassembly for rail vehicle.

Background

The oil pressure vibration absorber for the rail vehicle is used for reducing vehicle suspension vibration, ensuring that the rail vehicle safely and stably runs on a line, and improving the riding comfort of passengers. The oil pressure vibration absorber can be divided into a single-circulation oil pressure vibration absorber and a double-circulation oil pressure vibration absorber according to the flow direction of oil liquid when the vibration absorber moves, the vibration absorber with the consistent flow direction of the oil liquid when the vibration absorber moves in a stretching mode and a compressing mode is called as a single-circulation vibration absorber, and the vibration absorber with the inconsistent flow direction of the oil liquid when the vibration absorber moves in the stretching mode and the compressing mode is called as a. The double-circulation structure oil pressure damper bottom valve has the functions that: when the shock absorber does stretching movement, the check valve is opened to supply oil liquid for the inner cylinder, and when the shock absorber does compression movement, the check valve is closed, oil liquid can only flow out of the bottom valve assembly through the damping valve and generate damping force. The existing double-circulation structure shock absorber bottom valve component still has the following problems: the integrated valve plate is adopted, the weight of the valve plate is large, and the valve plate impacts the bottom valve seat when the shock absorber moves at high frequency, so that great noise can be generated, and the riding comfort of passengers is influenced; the matching surface of the valve plate and the bottom valve seat is large, the matching precision requirement is high, and the processing requirement is high; the matching surface of the valve plate and the bottom valve seat is easy to be collided/impacted and damaged, and the damaged valve plate is difficult to repair and easy to scrap, so that the manufacturing/overhauling cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a double-circulation structure oil pressure damper bottom valve component for rail vehicle, aiming at the defects of the prior art, the double-circulation structure oil pressure damper bottom valve component adopts a multi-group small valve piece type structure, the valve piece can not generate large noise when the oil pressure damper moves at high frequency, the sealing surface area of the valve piece is small, the processing difficulty is low, and the double-circulation structure oil pressure damper bottom valve component is easy to realize; the sealing surfaces of the valve plate and the valve plate seat are arranged in the bottom valve seat, so that the sealing surfaces are not easy to collide and damage; simultaneously with valve block complex valve block seat, core disk seat and base valve seat be detachable structure, can dismantle the change after impaired, can not cause scrapping of whole base valve seat, be favorable to the maintenance of product.

For solving one of above-mentioned technical problem at least, the utility model discloses the technical scheme who takes is:

a dual cycle structure oil damper foot valve assembly for a rail vehicle, comprising: disk seat, check valve system, clamp plate and damping valve system, wherein, the disk seat is equipped with water conservancy diversion through-hole and damping through-hole, the check valve system set up in the water conservancy diversion through-hole, the check valve system includes: the valve plate seat is provided with an oil through hole, the valve plate is arranged on the valve plate seat, the outer edge of the valve plate is provided with a groove, the groove is closed by the valve plate seat in a compressed state, the valve plate moves upwards to enable the groove and the inner wall of the flow guide through hole to form a through-flow gap in a stretched state, and two ends of the spring are respectively abutted to the valve plate and the pressing plate; the pressing plate provided with the oil hole is arranged above the flow guide through hole; the damping valve system is arranged in the damping through hole, and the damping valve system comprises: core valve, core valve spring and adjusting screw, the both ends of core valve spring respectively with core valve and adjusting screw butt, the lateral wall of core valve is equipped with the fluid window, during the tensile state, the fluid window passes through the inner wall of damping through-hole is sealed, during the compression state, the fluid window with the inner wall dislocation of damping through-hole is opened.

Further, the valve seat includes: the bottom valve seat is provided with the flow guide through hole, the core valve seat is detachably arranged on the bottom valve seat, and the center of the core valve seat is provided with the damping through hole.

Furthermore, the core valve seat is provided with a convex shoulder for pressing the pressing plate.

Furthermore, the inner wall of the flow guide through hole is provided with a boss, and the valve plate seat is in interference fit with the boss and is convenient to assemble and disassemble.

Furthermore, a plurality of grooves are annularly distributed on the outer edge of the valve plate.

Furthermore, the valve plate is of a star-shaped structure.

Furthermore, the number of the flow guide through holes is four, and the flow guide through holes are uniformly distributed along the center of the bottom valve seat.

Furthermore, the adjusting screw is in threaded connection with the damping through hole and is used for fixing the core valve and the core valve spring and adjusting the pre-pressure of the core valve spring.

Further, the core valve seat is in threaded connection with the middle through hole formed in the bottom valve seat.

The beneficial effects of the utility model include at least: the bottom valve component of the oil pressure vibration absorber adopts a multi-group small valve piece type structure, the valve piece can not generate great noise when the oil pressure vibration absorber moves at high frequency, the sealing surface area of the valve piece is small, the processing difficulty is low, and the realization is easy; the sealing surfaces of the valve plate and the valve plate seat are arranged in the bottom valve seat, so that the sealing surfaces are not easy to collide and damage; simultaneously with valve block complex valve block seat, core disk seat and base valve seat be detachable structure, can dismantle the change after impaired, can not cause scrapping of whole base valve seat, be favorable to the maintenance of product.

Drawings

Fig. 1 is a schematic structural view of the bottom valve assembly of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is the schematic view of the structure of the valve plate of the present invention.

Fig. 4 is an assembly view of the valve plate of the present invention.

Fig. 5 is a schematic diagram of the stretching movement of the bottom valve assembly of the present invention.

Fig. 6 is a schematic view of the compression movement of the base valve assembly of the present invention.

The valve comprises a bottom valve seat 1, a flow guide through hole 101, a boss 102, a core valve seat 2, a damping through hole 201, a shoulder 202, a valve plate seat 3, an oil through hole 301, a valve plate 4, a groove 401, a through-flow gap 402, a spring 5, a pressing plate 6, a core valve 7, an oil window 701, a core valve spring 8, an adjusting screw 9, a piston rod 10, a piston 11, hydraulic oil 12 and an inner cylinder 13.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following specific embodiments. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.

Example 1: referring to fig. 1, the utility model discloses a rail vehicle is with two circulation structure oil pressure damper foot valve subassembly mainly includes: the valve comprises a valve seat, a one-way valve system, a pressure plate and a damping valve system. The base valve assembly is of a multi-group nested check valve system structure, and several groups (4 groups or other groups) of check valve systems are uniformly distributed (non-uniformly distributed) along the center of the base valve seat, and in this embodiment, 4 groups are preferably described, as shown in fig. 2.

As shown in fig. 1, the valve seat is provided with a flow guiding through hole and a damping through hole, the check valve system is arranged in the flow guiding through hole, and the check valve system comprises: valve block seat, valve block and spring, the valve block seat is equipped with the fluid through-hole, the valve block set up in on the valve block seat, just the outer edge of valve block is equipped with the recess, during compression state, the recess quilt the valve block seat seals, during tensile state, the valve block shifts up and makes the recess with the inner wall of water conservancy diversion through-hole forms the through-flow clearance, the both ends of spring respectively with valve block and clamp plate butt, more specifically: the spring has certain pre-pressure to press the valve plate on the valve plate seat and is pressed by the pressing plate, so that the valve plate is tightly contacted with the valve plate seat in an initial state; the pressing plate provided with the oil hole is arranged above the flow guide through hole.

The damping valve system is arranged in the damping through hole, and the damping valve system comprises: the adjusting screw is in threaded connection with the damping through hole and is used for fixing the core valve and the core valve spring and adjusting the pre-pressure of the core valve spring by changing the screwing length of the adjusting screw; the two ends of the core valve spring are respectively abutted with the core valve and the adjusting screw, an oil window is arranged on the side wall of the core valve, the oil window passes through the inner wall of the damping through hole in a stretching state and is closed, and the oil window is opened in a staggered mode with the inner wall of the damping through hole in a compressing state.

In this embodiment, the valve seat includes: end disk seat and core disk seat, be equipped with on the disk seat of end the water conservancy diversion through-hole, core disk seat detachably set up in on the disk seat of end, just the center of core disk seat is equipped with damping through-hole, more specifically: the core valve seat is in threaded connection with the middle through hole formed in the bottom valve seat, so that subsequent overhaul is facilitated; the core valve seat is provided with a convex shoulder for pressing the pressing plate.

In the embodiment, the inner wall of the flow guide through hole is provided with a boss, and the valve plate seat is in interference fit with the boss so as to be convenient to assemble and disassemble; the number of the flow guide through holes is four, and the flow guide through holes are uniformly distributed along the center of the bottom valve seat.

The concrete shape of valve block is unrestricted, can guarantee for star type structure or other can with the contact the end valve seat fluid passageway the inner wall can contact the location and have the shape in through-flow clearance with the pore wall, as shown in fig. 3 and 4, a plurality of recesses have been laid along the spacer ring to the outer edge of valve block.

The operating principle of bottom valve assembly is: referring to fig. 5, when the oil damper moves in an extension direction (as indicated by an arrow in the figure), due to pressure difference, a valve plate on a valve plate seat is opened, oil outside an inner cylinder flows into the inner cylinder through oil holes in the valve plate seat, the valve plate and a pressure plate, and an oil path is shown as i; referring to fig. 6, when the oil pressure damper is in compression motion (in the direction of the arrow in the figure), the valve plate is closed, oil flows out from an oil window on the core valve, and damping force is generated, and the oil path is shown in ii.

To sum up, the bottom valve component of the oil pressure damper of the utility model adopts a multi-group small valve piece type structure, the valve piece can not generate great noise when the oil pressure damper moves at high frequency, the sealing surface area of the valve piece is small, the processing difficulty is low, and the realization is easy; the sealing surfaces of the valve plate and the valve plate seat are arranged in the bottom valve seat, so that the sealing surfaces are not easy to collide and damage; simultaneously with valve block complex valve block seat, core disk seat and base valve seat be detachable structure, can dismantle the change after impaired, can not cause scrapping of whole base valve seat, be favorable to the maintenance of product.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that various changes, modifications, substitutions and alterations can be made in the above embodiments by those skilled in the art without departing from the scope of the present invention, and that various changes in the detailed description and applications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims (9)

1. A rail vehicle is with two circulation structure oil pressure bumper bottom valve subassembly which characterized in that includes: a valve seat, a one-way valve system, a pressure plate and a damping valve system, wherein,

the disk seat is equipped with water conservancy diversion through-hole and damping through-hole, the check valve system set up in the water conservancy diversion through-hole, the check valve system includes: the valve plate seat is provided with an oil through hole, the valve plate is arranged on the valve plate seat, the outer edge of the valve plate is provided with a groove, the groove is closed by the valve plate seat in a compressed state, the valve plate moves upwards to enable the groove and the inner wall of the flow guide through hole to form a through-flow gap in a stretched state, and two ends of the spring are respectively abutted to the valve plate and the pressing plate;

the pressing plate provided with the oil hole is arranged above the flow guide through hole;

the damping valve system is arranged in the damping through hole, and the damping valve system comprises: core valve, core valve spring and adjusting screw, the both ends of core valve spring respectively with core valve and adjusting screw butt, the lateral wall of core valve is equipped with the fluid window, during the tensile state, the fluid window passes through the inner wall of damping through-hole is sealed, during the compression state, the fluid window with the inner wall dislocation of damping through-hole is opened.

2. The dual cycle structure oil damper base valve assembly for a railway vehicle as claimed in claim 1, wherein the valve seat comprises: the bottom valve seat is provided with the flow guide through hole, the core valve seat is detachably arranged on the bottom valve seat, and the center of the core valve seat is provided with the damping through hole.

3. The dual cycle structure oil damper base valve assembly for a railway vehicle as claimed in claim 2, wherein the spool valve seat is provided with a shoulder for pressing the pressing plate.

4. The bottom valve assembly of dual-circulation structure oil pressure vibration absorber for railway vehicle as claimed in claim 1, wherein the inner wall of said flow guiding through hole is provided with a boss, and said valve plate seat is in interference fit with said boss for easy assembly and disassembly.

5. The dual cycle structure oil damper base valve assembly of claim 1, wherein the outer edge of the valve plate is provided with a plurality of grooves at intervals.

6. The dual cycle structure oil damper base valve assembly for a railway vehicle as claimed in claim 5, wherein the valve plate is of a star-shaped structure.

7. The dual cycle structure oil damper base valve assembly for a railway vehicle as claimed in claim 2, wherein the number of the flow guide through holes is four, and the flow guide through holes are uniformly distributed along the center of the base valve seat.

8. The dual cycle structure oil pressure damper base valve assembly for a railway vehicle as claimed in claim 1, wherein the adjusting screw is threadedly coupled to the damping through hole for fixing the spool and the spool spring and adjusting the pre-pressure of the spool spring.

9. The dual cycle structure oil pressure damper base valve assembly for a railway vehicle as claimed in claim 2, wherein said core valve seat is threadedly attached within a central through hole provided in said base valve seat.

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